Q: My 44-month-old child has a returning fever after being discharged for Mycoplasma pneumonia. Should we go back to the hospital?
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My 44-month-old child was hospitalized for 5 days due to lobar pneumonia caused by antibiotic-resistant Mycoplasma. We were discharged after confirming via X-ray that the lobar pneumonia had cleared, although some mild pneumonia remained. It has been 3 days since discharge, and we had a follow-up outpatient visit today.
The child's phlegm and cough are still severe, but the doctor said their breathing sounds are fine and reduced their two antibiotics down to one. However, the fever has returned. It fluctuates between 37.8–38.0°C. Even without fever reducers, it drops to 37.4–37.5°C on its own and then rises back to 38.0°C. Their normal basal temperature is around 37.1–37.3°C.
Overall, my child's condition and energy levels are good. Should we go back to the hospital for another check-up, or is it safe to observe a bit longer at home?
Answer:
It is completely understandable to be worried about a returning fever after your child's discharge from the hospital.
Current Situation Summary
Your child is recovering from Mycoplasma pneumonia (antibiotics have been reduced to one type).
It is 3 days post-discharge, and an outpatient visit was completed today.
Phlegm and cough are still present, but breathing sounds are clear.
Fever fluctuates between 37.8–38.0°C, but the child's overall energy and condition are good.
What You Can Do at Home
Frequent hydration: Encourage your child to drink plenty of fluids to help thin the mucus and prevent dehydration.
Elevate the upper body: Prop them up slightly while sleeping to help with mucus drainage and ease breathing.
Maintain indoor humidity: Keep the room's humidity levels between 40–60%.
Fever management: Consider using fever reducers if the temperature rises above 38.5°C and your child is uncomfortable. If they are playful and comfortable, medication is not strictly necessary for a mild fever.
Antibiotics: Make sure to continue giving the prescribed antibiotics exactly as directed until they are completely finished.
Understanding Mycoplasma Pneumonia
Coughing and phlegm can take 2 to 3 weeks to slowly resolve.
A mild, fluctuating fever (37.5–38.0°C) can linger for a few more days even as the infection clears.
If your child's condition is good and they are breathing comfortably, it is generally safe to continue observing them at home.
Signs That Require Immediate Medical Evaluation
If you notice any of the following red flags, please take your child to a pediatrician or an emergency room for a prompt re-evaluation:
Changes in breathing: Wheezing, grunting, nasal flaring, or chest retractions (the skin pulling in under the ribs).
A fever of 39°C or higher that persists or does not respond to fever reducers.
Sudden lethargy, extreme sleepiness, or refusal to eat/drink.
No urination for more than 8 hours.
Complaints of chest pain.
Since today's outpatient visit confirmed that the pneumonia is improving and the antibiotics were adjusted accordingly, you can safely monitor your child at home until tomorrow morning, provided their overall condition remains good. However, if any of the warning signs listed above appear, please visit a doctor in person immediately for further evaluation.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
